Controlled drives

Elektrotechnika, a.s. is the successor of the traditional semiconductor converter industry for a wide range of applications. These traditions are based on the concept of the modern series of power semiconductor converters MODULEX, VARIANT and COMPACT. The conceptual design of these systems makes it possible to assemble semiconductor converters of small, medium and high power, in the range of 380-s-15 kV. EMADYN and MICRODYN microprocessor control systems are used to control and control these semiconductor converters - download catalog

  • optimization of power take-off at lower demand for driven technology output
  • prolongation of motor service drive
  • elimination of negative effects of motors on supply network during run up and setting of required values for actual running speed
  • comfort control, visualization, diagnostics and easy communication between the device and the user
  • power semiconductor converters with outputs from 50MW and 15kV voltage
  • direct connection of converters to HV network without the need to use a transformer (minimization of built-up space and total costs)
  • technology of direct air cooling of converters by heat pipes results in reduced dimensions of converters and design without external exchangers and water management


tension up to 500V up tp 1500V up to 10kV up to 35kV up to 6kV

Converter systems
design series of second generation power semiconductor converters MODULEX, VARIANT, COMPACT and INVERT

  • provides for composition of semiconductor converters of small, medium and large capacity within the range up to 35 kV
  • They are based on replaceable blocks with semiconductor components and air coolers working on heat pipe principle.
  • semiconductor cooling systems allow significant reduction of weight and dimensions of converters
  • Optical conductors are used for control signals of converters designed for high voltage - they significantly improve reliability and resistance of converters against noise
  • Converter design allows replacement of power semiconductor blocks

Areas of application

  • mining and metallurgical industry
  • gas, crude oil and chemistry
  • infrastructure
  • processing industry
  • power industry
  • ecology

Frequency converter series INVERT 7L W